Спутник ДЗЗ. DESDynI. [Редактировать]

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Найдено 173 документов по запросу «DESDynI». [Перейти к поиску]


Дата загрузки: 2016-11-23
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0.31/5
DESDynI Lidar for Solid Earth Applications ...-As part of the NASA's DESDynI mission, global elevation profiles from... the primary objective of the DESDyni-Lidar is the recovery of... the moderate resolution multi-beam DESDynI-Lidar into processing of SAR... an excellent setting for testing DESDyni capabilities to recover fundamental parameters... DESDyni-Lidar calculated ground tracks (Fig. 1). We used a single pass of DESDynI... terrace surfaces (I·IV) and the DESDynI-Lidar (NE-SW) ground tracks... laser energy, we generated pseudo-DESDynI waveforms from the last return... of even the medium footprint DESDynI-Lidar data over the standard... the Sullivan anticline. Additionally, the DESDynI-Lidar derived elevation profiles will... images. A. Centroid elevations along jive DESDynI-Lidar ground tracks The centroid... waveform has been simulated assuming DESDynI-like parameters for the observations... optimum orientation for future roughly N-S DESDynI-Lidar ground tracks (Fig. 1). The... Bay. The significance of the DESDynI-Udar simulations is that surface... hard to discern in the DESDynI-Udar elevation profiles. B. Future steps... the terraces To simulate the DESDynI-Lidar waveforms from aircraft point... systems such as LVIS and DESDynI-Lidar is that is it... EARTHQUAKE As summarized in the DESDynI Science Definition Document, "in areas... above, we simulated waveforms along DESDynI-Lidar ground tracks over the... great earthquakes with just one DESDynI-Udar pass assuming a 5 laser beam...-earthquake DEM along with the DESDynI Udar over the region. Alternatively... Report of the DESDynI Applications Workshop [11]. V. SUMMARY Since DESDynI-Lidar would...-slip event in southern Alaska, DESDynI-Udar could provide new and... off-nadir pointing to previous DESDynI-Udar transects. We have found... Lidar as part of the DESDynI mission. REFERENCES [1] J.B. Blair, J. Ranson, R. Dubayah... Structure, and Dynamics of Ice (DESDynI), A NASA Mission in the NRC..., and J. Rundle, Report of the DESDynI Application Workshop, 2009. 4



Дата загрузки: 2016-11-23
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0.26/5
DESDYNI LIDAR FOR SOLID EARTH APPLICATIONS J.... the primary objective of the DESDynI-Lidar is recovery of the... earlier study we generated pseudo DESDynI waveforms with high correlation (Figure... point cloud data to generate a DESDynI like waveforms and a modified post... an excellent setting for testing DESDynI capabilities to recover fundamental parameters... optimum orientation for future roughly N-S DESDynI-Lidar ground tracks. The terraces... the NCALM data along the DESDynI-Lidar calculated ground tracks. An... EARTHQUAKE As summarized in the DESDynI Science Definition Document, “in areas.... Here we simulated waveforms along DESDynI-Lidar ground tracks before and... “after” waveforms. For the future DESDynI -Lidar acquisitions, we will need... Report of the DESDynI Applications Workshop11. 5. SUMMARY Since DESDynI-Lidar would penetrate...-slip event in southern Alaska, DESDynI-Lidar could provide new and... some offnadir pointing to previous DESDynI-Lidar transects. We have found... Lidar as part of the DESDynI mission. 6. REFERENCES [1] J.B. Blair, J. Ranson, R. Dubayah...]DESDynI Science Study Group, Deformation, Ecosystem Structure, and Dynamics of Ice (DESDynI..., and J. Rundle, Report of the DESDynI Application Workshop, 2009.



Дата загрузки: 2016-11-23
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0.18/5
PolInSAR Methods For Ecosystem Science 2011 Carbon Cycle & Ecosystems Joint Meeting 1 Introduction & Motivation !!Ecosystem structure scientists (especially on ESWG) exposed frequently to PolInSAR via DESDynI !!Considerable uncertainty about efficacy of PolInSAR led to no ecosystem requirements on the InSAR segment of previous DESDynI mission !! !! !! !! Lack of US ecosystem community experience with polInSAR Lack of peer-reviewed papers Lack of access to airborne and field data sets to assess utility Great worry over temporal decorrelation 2 Introduction & Motivation !!DESDynI Science Steering Group (DSSG) and broader ESWG recognized the potential of PolInSAR !! Terrestrial Ecology funded exploration of algorithm development and field experiments (UAVSAR/LVIS joint deployments). !!Discussion about a potential joint PolInSAR mission with DLR (TANDEM-L) with previous DESDynI mission !! Development of draft science requirements !! Draft statement from AGU 2010 meeting "! “The Ecosystem Structure team strongly supports the pursuit of Tandem-L in the DESDynI Project” 3 Introduction & Motivation !!Cancellation of DESDynI lidar unfortunate and helped motivate the present meeting !! “Our community’s options for structural measurements in the near!! term have been much constrained during the past year, and we need to be able to understand and assess our remaining options.” Community examining potential/efficacy of ICESAT2 for vegetation structure -> great uncertainty !!Progress on potential joint missions (e.g. BIOMASS & TANDEML) predicated on mutual understanding and comprehension !!Joint science meeting is long overdue !! Potential joint experiment would be be exceptionally useful !!First step in all these activities is exposure of US ecosystem community to potential of PolInSAR 4 NASA’s Proposed DESDynI* Mission Radar designs for proposed DESDynI mission being studied in pre-Phase A TDRSS downlink L-band 5-80 MHz BW Quad-pol Radar 9-15 m mesh reflector 12-24 element transmit and receive array 12-24 dual-pol receive channels 180-360 km swath, full res, full-pol Better than -25 dB NES0 at 20 MHz BW !"#$"%&'()("*+,-./0,&1(#2,3%34*.($4-5245-*1(/&6("%&/.723(,+('2*( Pre-decisional – for Planning and Discussion Purposes Only! January 2011 MCR DESDynI Concept Must be re-thought Due to Current OMB Direction L-band Polarimetric SAR ? Ecosystem Structure Canopy Height! Biomass! Biomass, Vegetation Structure, Effects of changing climate on habitats and CO2,, disturbance ? ? ? Multibeam Profiling LIDAR Cryosphere Ice velocity, thickness Response of ice sheets to climate change & sea level rise L-band Repeat Pass InSAR Solid Earth Surface Deformation Geo-Hazards Water Resource Management 91-day repeat ~370 km orbit 25 m spot 5 beams Pass 1 Pass 2 Two spacecraft not at same scale ? 13 day repeat ?~600 km orbit 250-500 m orbit control ? 220 km swath Full resolution over swath MHz modes ? 5,20+5,40,80 SP, DP, QQP, QP modes 3 -6 Outlook for DESDynI •! President’s FY12 Budget Proposal (February 2011) reset the go- forward plan for DESDynI –! Lidar mission to be contributed, not funded by NASA –! Radar mission to be implemented more affordably •! NASA continues to invest in DESDynI –! Forming a Science Definition Team –! Continuing trade studies at JPL •! NASA is currently exploring options for reducing cost –! Reducing number and scope of science requirements levied on DESDynI ! DESDynI in combination with other satellites to approach DESDynI requirements –! Find international partners interested in the science and technology ! Ongoing Tandem-L studies with DLR ! Ongoing discussions with several potential partners –! Find domestic partners that would increase utility of DESDynI data 7 Possibilities with PolInSAR – an SRTM analogy •! Prior to SRTM, most users were familiar with quality and character of topography derived from optical stereo •! Despite a concerted effort, attempts to produce uniform high-quality global topography were unsuccessful •! SRTM was selected as a practical alternative to previously attempted methods to fill the gap in global topography –! Sponsors recognized that the data characteristics would be different from optical stereo •! SRTM is now a widely used data sets for science and applications –! Some of its unique qualities (e.g. “electrical height”) are being exploited for canopy height and biomass studies •! Similarly, PolInSAR may be able to fill a gap in global estimates of above-ground biomass and forest structure •! PolInSAR is an extension of SRTM techniques, estimating a number of heights in the canopy to infer structure. 8



Дата загрузки: 2017-02-23
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0.06/5
... the earthquake cycle GPS InSAR (DESDynI) Geophysical Sensor Web Portlet Summary... Database Interferogram Fault Data 20 DESDynI Mission Deformation, Ecosystem Structure, and...-height accuracy of 1 m Observation Techniques DESDynI is defined by the decadal... is on Deformation Objectives for DESDynI Determine the likelihood of earthquakes... modes High data volumes for DESDynI drive new paradigm for data... QuakeSim to DESDynI Mission Design Measurement Requirements Validate that DESDynI will meet the science objectives Assess the quality of DESDynI... sensitivity analysis Data Volume for DESDynI DESDynI data volume is an order... Expansion factor is 5.2 for all DESDynI data products Processed data 29... Can Serve as Prototype for DESDynI Data Processing We are deploying... operational TeraGrid Supercomputing Resources 30 DESDynI Deformation Data Analysis QuakeSim integrates... Will provide computational infrastructure for DESDynI data analysis and interpretation GeoFEST... End-to-End Flow Data DESDynI InSAR Data HPC Processing Center... deformation InSAR portion of the DESDynI mission Developing Grid services with...



Дата загрузки: 2016-11-23
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0.37/5
... Radar Processing Concepts for the DESDynI Mission Yunling Lou, Steve Chien... June, 2010 Arlington, Virginia 1 Agenda •  DESDynI mission measurements overview •  Benefits of... of onboard products •  Future work 2 DESDynI Mission Measurements Overview Polarimetric SAR... Repeat Pass InSAR Pass 2 Pass 1 DESDynI will exploit an L-band polarimetric... Dynamics Changes in Earth’s Surface DESDynI ‐ Deforma/on, Ecosystem Structure, and... Advantages of Onboard Processing for DESDynI Mission   DESDynI Radar is an L-band... of Onboard Processing Technology for DESDynI Mission Solid Earth Desired Repeat... for DESDynI Mission’s Radar Instrument Onboard Processor Onboard Autonomy Software DESDynI Analyze...



Дата загрузки: 2017-03-18
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0.08/5
... Structure, and Dynamics of Ice (DESDynI) Radar satellite. Two climate-focused... will be completed for the DESDynI mission, with the NASA effort... for the Lidar element. The DESDynI launch date will be determined...-B and initiate the spacecraft contract; - DESDynI will complete its Phase A formulation... 2016, respectively. A third Tier I mission, DESDynI, will complete its pre-formulation...-2. The launch plans for the DESDynI mission will be informed by...) and complete its confirmation review; - DESDynI will complete its pre-Phase... Structure, and Dynamics of Ice (DESDynI) The DESDynI mission is a Tier-1 decadal... two separate spacecraft. The overall DESDynI radar/lidar mission will greatly... pre-formulation activities for the DESDynI mission, with the studies focused... manages OSTM, ACRIMSat, SMAP, QuikSCAT, DESDynI, CLARREO, and Jason. Project Management... TBD ICESat-2 GSFC GSFC TBD DESDynI JPL JPL, GSFC TBD CLARREO...



Дата загрузки: 2017-01-23
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... Data System Approach for the DESDynI Mission Oh-ig Kwoun, David... Data System (SDS) for the DESDynI (Deformation, Eco-system Structure, and... helping DESDynI achieve its many science goals and objectives. I. INTRODUCTION DESDynI stands... Passive) that started in 2008. DESDynI is currently in the midst... a potential project start in 2010. DESDynI poses an unprecedented set of... serving three major scientific disciplines. DESDynI’s radar is expected to collect... utility of the data set, DESDynI plans to work closely with... maximize to the greatest extent DESDynI data products’ utility to the... the highlights of the DESDynI mission, the DESDynI data system challenges, the... architectural concept and design, the DESDynI data system operations concept, and.... II. THE DESDYNI MISSION DESCRIPTION A. The Mission A brief DESDynI mission overview is included in Figure 1. DESDynI is a 3 to... in the 2018 time frame. DESDynI is dedicated to support scientific...), and cryosphere (dynamics of ice). DESDynI employs two principal instruments, a high... in wide swath. The Figure 1. DESDynI Mission Overview Page 1 of 4 SweepSAR..., thereby enabling 3-D deformation mapping. TABLE I. DESDYNI SAR INSTRUMENT CHARACTERISTICS Altitude 761... B. The DESDynI Science Data Products There are currently 28 DESDynI radar and... archive and distribution. Amongst the DESDynI data products, it is anticipated... prospective applications/operations users. III. DESDYNI SCIENCE DATA SYSTEM A. Science Data... The main responsibility of the DESDynI Science Data System (SDS) is... products, significant challenges to the DESDynI SDS include designing and adopting... that promote utilities of the DESDynI data sets. Figure 2. SDS Functional... Page 2 of 4 B. DESDynI Science Data System Conceptual Design The DESDynI SDS has... reduce risks and costs. In DESDynI’s modular architecture (see Figure 2), the... data analysis. C. DESDynI Science Data System Operations Concept The DESDynI SDS is... associated with staging and storing DESDynI’s large data volume, innovative data... are in consideration for the DESDynI SDS [9]. TABLE II. DATA STORAGE... Data System approach for the DESDynI mission that is modular in... associated with transforming the many DESDynI science algorithms into operational codes... forms a strong basis for helping DESDynI achieve its many science goals..., 2007. D. Cuddy, D. Freeborn, and P. Callahan, "DESDynI Science Data System (SDS) pre..., NASA JPL, Nov. 2009. W. T. Johnson, “DESDynI Radar pre-MCR Peer Review... 2009. D. Cuddy, O. Kwoun, and K. Leung, "DESDynI Operations Concept pre-MCR Peer...



Дата загрузки: 2016-12-08
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0.21/5
... diagnosis LEO, NonSSO Laser altimeter DESDynI Surface and ice sheet deformation..., University of Washington 16 DESDynI Mission Overview  DESDynI Reflector Mission Science Deformation... in ice masses and climate   DESDynI Feed Instruments LIDAR (Fixed) Multi... precision orbit determination and reconstructions   DESDynI Implementation Challenges Accommodating multi-beam...)  MCR Project Documents (Sep09) 17  DESDynI Science Study Group Membership Co... mission concept maturity • CLARREO and DESDynI will be the next two... of 2009 33 Near Term: DESDynI and CLARREO • CLARREO, implemented out... 2009 • MCR – September/October 2009 • DESDynI, implemented out of JPL • • Completed... e-A Pr e-A M ission I CESat I I SM AP DESDynI CL ARREO SWOT HyspI RI... welcomed and desired Date Mission DESDynI June 5-6 ACE June 19-20... 21-23 October 29-31 DESDynI DS Tier 1 & 2 December 18 SWOT... SAR NASA/DLR DESDynI/TanDEM-L TIM-6 1/8-9/08 ICESAT/DESDynI Meeting 10/16...



Дата загрузки: 2017-01-04
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0.21/5
... number 2 2010 Summer/Fall Goddard’s DESDynI It’s not the Biggest! It..., Ecosystem Structure, Dynamics of Ice (DESDynI’s) Light Detection and Ranging (LIDAR... balance the Earth’s carbon budget. DESDynI’s Lidar mission adds the third... in the Earth’s terrestrial ecosystems. DESDynI will allow scientists to finally... Earth’s climate. Artist’s Sketch Overview: DESDynI is one of NASA’s Tier... 2016-2017 time frame. The DESDynI mission is composed of two... the DESDynI mission in meeting the science community needs. DESDynI Science: DESDynI plans... Oceanic and Atmospheric Administration. The DESDYnI Lidar will also make major... rapid rises in sea level. DESDynI will help address these questions... ICESat II. To ensure that DESDynI meets its science requirements, Goddard... Sensor (LVIS) has been collecting DESDynI-like data sets over a variety... they provide the DESDynI Scientists a taste of what DESDynI will provide and... a similar role for the DESDynI SAR. The DESDynI SAR will provide annual... the mapping capability of the DESDynI SAR. (DESDynl Continued on page... (DESDynl Continued from page 11) DESDynI Mission and Observatory: The Mission...) laser. The heart of the DESDynI multi-beam, full-waveform laser... reduced cost. HOMER and the DESDynI Lidar instrument designs represent the... fact bodes well for the DESDynI Lidar mission as the instrument... shots. Summary: In short, Goddard’s DESDynI Lidar Mission boasts to make... with the DESDynI Lidar mission. Andre’ Dress, Code 420 DESDynI Lidar Project...



Дата загрузки: 2017-04-09
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0.65/5
... Structure, and Dynamics of Ice (DESDynI) satellite 10, which would include....html http://desdyni.jpl.nasa.gov/mission/ 11 http://desdyni.jpl.nasa...?missionID=649 10 Figure 30 DESDynI measurement concept 14. Section 5.2.2: Below... et al, 2010). 14 http://desdyni.jpl.nasa.gov/files/DESDynIWG_lidarv5...